Based on our record, Air Display should be more popular than iDisplay. It has been mentiond 3 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Https://avatron.com/applications/air-display/ Not sure, if it does screen mirroring. Source: almost 3 years ago
If you're talking about Target Display Mode, I'm afraid your iMac does not support it. You can still use something like Air Display, although I'm not sure if it will help you achieve what you want. Source: over 3 years ago
The other option is via software like AirDisplay, but that does cost money as well! Source: about 4 years ago
I have done some research and found iDisplay. However that only works for windows, macOS and android and I dont think it would work over wine. Source: over 1 year ago
Duet Display - With Duet Display, you can transform your iPhone or iPad into a second display to expand the screen space of your PC or Mac system.
spacedesk - spacedesk expands the Windows desktop computer screen to other computers over the local area...
Luna Display - Hardware that turns the iPad into a wireless second display
Splashtop Wired XDisplay - Use Splashtop Wired XDisplay to turn your iPad, Android tablet, Kindle or smartphone into a high-performance extra monitor for your computer.
DisplayPad - DisplayPad is an online cutting edge solution that designed to use your iPad as a second or extra display for your Mac device.
Astropad - Astropad is a free form drawing tool designed from the ground up to take advantages of the features offered by an iPad.